I have tried today memoriser and give me errors under windows 8.1It's an old program. Even skynergy.com seems other webpage today. ---Access violation at address 004589B4 in module 'Memoriser.exe'. Read of address 00000004.----It was useful for me to memorize phone numbers because correct you while your write. So is the number begins with 3 and you put a 4 you receive a warning error. Until you propose the correct number you can't continue introducing any other one.